<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>姓名案列</title>
    <script src="../js/vue.js"></script>
</head>
<body>

    <div id="root">
        姓：<input type="text" v-model="firstName" > <br><br>
        名：<input type="text" v-model="lastName" ><br><br>
        全名：{{fullName}}
    </div>

    <script>
        Vue.config.productionTip = false

        const vm = new Vue({
            el: '#root',
            data: {
                firstName: '张',
                lastName: '三',
            },
            computed: {
                // fullName: {
                //     get() {
                //         console.log('get');
                //         return this.firstName + '-' + this.lastName
                //     },
                //     set(value) {
                //         console.log('set ', value)
                //         const arr = value.split('-')
                //         this.firstName = arr[0]
                //         this.lastName = arr[1]
                //     }
                // }
                fullName() {
                    return this.firstName + '-' + this.lastName
                }
            }
        })
    </script>
</body>
</html>